Question about 2005 kawasaki KX 125

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What is the Kawasaki kx 125 compression i did test tested 135 with cold motor is this what it shuld be i get real bad bog at low rpm

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Anything over 120 on compression test is ok. anything under 120 and its time for top end. and for bog you might try cleaning carb.

Posted on Jun 09, 2010


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My kx125, can still start it and ride it without a lot of compression, it only gets compression about half way towards the bottom when kicking it, but it does start.. Any ideas??

Hi, Colin you may have a kicking gear engagement issue, do a compression test when the engine is at operating temperature should be around 125-130 psi. for more information about your question and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
Minimum Compression Required
Curing 2 cycle engine problems
Small Engine Repair Compression Test on 2 Stroke Craftsman Chainsaw

Mar 26, 2016 | 2003 kawasaki KX 125

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Kx 125 sputtering in high rpms

check and make sure choke is opening all the way,if it is only opening part way could explain why you don't need to use choke at all to start and then at higher rpm's it is not getting enough air causing it to basically choke it self out.

Apr 03, 2013 | 2003 kawasaki KX 125

2 Answers

2004 Kawasaki KX 125 quit running

Hey Steve
Put a new spark plug in first...
... Sounds more like a fuel delivery issue... (the jests are in the carb and are considered one item). IF THE ENGINE HAS BEEN MODIFIED - FIND A REAL PRO THAT KNOWS HOW TO JET AN ENGINE - I CANNOT STRESS THIS ENOUGH - THIS IS not FOR AMATEURS!!
Make sure you have fuel flowing to the carb..(turn the gas off at the petcock - remove the gas line and then turn the gas on -- if its flows quickly and a full stream - turn the gas off, reconnect the gas line. Now, on to the carburetor... IF you are a great mechanic, you can clean and set the carb..IF NOT - take it to a qualified pro!! After the carb is cleaned and set.. it should run great...
Please reply to me when you are done with these steps..

Jun 22, 2017 | 2004 kawasaki KX 125

1 Answer

My 1990 kx 125 stalls after about 5 mins of bogs down through the gears and stalls

is the compression good on your engine have you checked and cleaned the carb out also are you running the right pre mix ratio about 32:1 which is about 156 ml oil to 5 litres of petrol

Oct 26, 2010 | kawasaki KX 125 Motorcycles

1 Answer

Need gas-oil ratio on 2004 kawasaki kx 125 2 stroke bike

32:1--40:1 any less than 40:1 And you take risk of damaging engine(crank and top end),Any more than 32:1 and it will smoke real bad and foul spark plugs alot.....

Aug 01, 2010 | 2004 kawasaki KX 125

2 Answers

I have an 86 kx 80 my problem with it is it doesnt have enough power sometime it does and somtimes it doesnt up a hill it goes slow and when in nuetral and i rev it hight it high it will not have a...

Could have low compression or bad reed valves, if you take your hand and move the kick starter is it easy to do? i would do a compression test.

Feb 10, 2010 | 2003 kawasaki KX 125

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